4123:1-5-05
Auxiliary equipment.

Where overhead conveyors carry material with a clearance of
seven feet or more above the floor level, and cross designed walkways or roads,
or pass over areas where employees are normally at work, a substantial barrier
shall be installed to catch falling material.

In addition to the requirements of paragraph (C)(1)(a) of this
rule, the auger of screw conveyors shall be operated with covers secured in
place. Covers shall be solid or of wire mesh, in accordance with rule
4123:1-5-99 of the Administrative Code, and covers
designed for regular removal shall be interlocked so that removal will
disconnect power source.

Pinch points created by travel of conveyor belts over or
around end, drive and snubber, or take-up pulleys of chain conveyors running
over sprocket wheels shall be guarded or a means shall be provided at the pinch
point to disengage the belt or chain from the source of power.

Means shall be provided at each machine, within easy reach of
the operator, for disengaging it from its power supply. This shall not apply to
rolling departments of iron and steel mills nor to electrical power generation
or conversion equipment.

The employer shall furnish and the employees shall use a
device to lock the controls in the "off" position or the employer shall furnish
and the employees shall use warning tags when machines are shut down for
repair, adjusting, or cleaning.

Portable machinery mounted upon trucks or bases shall be
securely fastened thereto, and such truck or base shall be so locked or blocked
as to prevent movement or shift while such machine is in operation.

Counterweights exposed to contact shall be guarded, or secured
with safety chain or wire rope so the counterweight shall not descend to a
level less than eight feet above the floor or working level, where employees
are required to perform their assigned duties or where employees are required
to pass through in the performance of their assigned duties.

Portable electric tools and equipment shall be provided with a
means of grounding or shall be protected by a system of double insulation.
Where such approved system is employed, the equipment shall be distinctively
marked.

When the periphery of the blades of a fan used for direct
ventilation or cooling of employees, such as desk fans, pedestal fans, and wall
fans, is less than seven feet above the floor or working level, the blades
shall be guarded. The guard shall be firmly attached to its mount so that it is
either permanently affixed, or tools are required for removal, or, in the case
of spring-type fasteners or wingnuts, sufficient force is required for removal
so that the guard device is not inadvertently removed.

Any opening in a guard shall have at least one of its
dimensions no greater than one inch and the distance from the guard to the
blade shall be equal to or greater than the values listed in the following
table to this rule.

Other fans, such as those used in process cooling, whose blade
is less than seven feet above the floor or working level, shall meet the
requirements of rule 4123:1-5-99 of the Administrative Code. The
distance from the guard to the blade must be sufficient to prevent any part of
any employee's body from inadvertently contacting the blade.